/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneCachedEntityFilterResult.h
Check our system version number against the current structural number in the entity manager.
UpToDate if the structure has not changed, Stale if it has
[ECachedEntityManagerState](API\Runtime\MovieScene\EntitySystem\UE__MovieScene__ECachedEntityMan-) Update ( const [FEntityManager](API\Runtime\MovieScene\EntitySystem\FEntityManager) & InEntityManager )